UM66T-08S UM66T Simple Melody Generator __________________________________________________________________________ Features • 64-note ROM memory • 1.3V to 3.3V operating voltage and low power consumption • Packaged in inexpensive TO-92 package • OSC resistor is built-in. • One-shot mode to play and auto stop • Dynamic speaker can be driven with external NPN transistor. General Description The UM66T-08S is a CMOS LSI designed melody generator IC for use in door bells , toys and other consumer products, which require auto-stop playing function. It has an on-chip ROM programmed for musical performance. Produced by CMOS technology, the device results in very low power consumption. And with built-in oscillator, a compact melody module can be constructed with only a few additional components. Absolute Maximum Ratings DC Supply Voltage ......................................... -0.3V to +5.0V Operating Ambient Temperature .................... -10°C to 60°C Storage Temperature ....................................... -55°C to 125°C Electrical Characteristics (Vss=0V, Vdd=1.5V, Ta=25°C, unless otherwise specified.) Parameter Symbol Min. Typ. Operating voltage Vdd 1.3V 1.5V Current Consumption Idd 16µA Output Current Io/p 2mA Osc. Frequency Fosc 63kHz 90kHz Pin Configuration (Front View) Pin no. 1 2 3 Symbol O/P Vdd Vss Description Melody Output Positive Power Supply Negative Power Supply Max. 3.3V 50µA 117kHz Conditions Playing with no load Typical Application Circuits ONE-SHOT MODE FOR SPEAKER ONE-SHOT MODE FOR PIEZO BUZZER USING NORMALLY CLOSED SWITCH Recommended values : C = 1µF , R = 4.7KΩ , Q = 2SC9013 REV.05-2001 (2 pages)